Washington D.C. [USA], May 19 (ANI): A new study has linked a father's pre-conception vitamin D intake with his child's height and weight at five years old. The study presented at this year's European Congress on Obesity (ECO) in Porto, Portugal is by Dr Cilia Mejia Lancheros and colleagues at the School of Public Health, Physiotherapy and Sports Science, University College Dublin, Ireland. The researchers analysed data from the Lifeways Cross-Generation Cohort Study, a unique longitudinal database in Ireland. Information on paternal vitamin D intake from baseline food frequency questionnaires and children's height and weight measurements were available for 213 and 148 father-child pairs when children were aged 5 and 9 years respectively. The association between father's vitamin D intake reported during the first pre-natal trimester and the height and weight of children at age 5 and 9 was calculated using a model adjusted for several possible confounders including: paternal age, energy intake height, weight, and being the biological father; maternal age, vitamin D and energy intake height, and weight; and child's sex, age, vitamin D and energy intake, and summer outdoor physical activity aged five. In adjusted models, paternal vitamin D intake was positively and statistically associated with offspring's height and weight at 5 years old; whilst these associations were reduced, and no longer statistically significant, when offspring reached 9 years old. The findings remained similar when analyses were repeated with only biological fathers. Interestingly, the findings showed no association between a mother's vitamin D intake during the first and second trimester of pregnancy and children's weight and height at either age five or nine years. Skin exposure to sunlight is essential for the body to produce vitamin D, so the authors also looked at the number of hours children aged 5 spent playing outdoors during summer. They found that spending 3 or more hours playing outdoors during weekends was related to increased height at 5 years of age. The authors concluded: "Paternal vitamin D intake was positively and prospectively associated with offspring's height and weight at 5 years old, independent of maternal characteristics, meriting further investigation of familial dietary pathways." They added: "One reason this may occur is that father's nutrition status may somehow influence the health, quality and function of their germ cells, which are involved in reproduction. Thus, maternal nutrition may not be the only key factor in offspring's growth development and health." (ANI)

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